I think Salsabeel meant that the word would be stress muharrakaati (not sure, though). I think, however, it would be stressed muHarrakaati, since a long vowel at towards the end of a word would take the stress.

Traditional Arabic grammar does not have a concept of “stress” or “accent”. That is why whenever a question like this comes up a lot of our Arab friends think you are asking about tashdīd (which you are not, of course).

The answer to your question is that most Arabs will say muḥarrakātī with a strong stress on the long ā.